Multivitamin product used to treat or prevent vitamin deficiency due to poor diet, certain illnesses. Vitamins are important building blocks of the body and help keep you in good health. Multivitamins are used to provide vitamins that are not taken in through the diet. Multivitamins are also used to treat vitamin deficiencies (lack of vitamins) caused by illness, pregnancy, poor nutrition, digestive disorders, and many other conditions.